Creating an rdlc report with multiple tables (one-to-many relationship)

问题

So, I'm new to rdlc (and reporting in general actually). I have a table that has a one-to-many relationship with another table, and I'm trying to represent them in an rdlc report as multiple tables for each item.

Note: The tables are originally created using Entity Framework code-first.

Here are the two tables (and the parent one):

Now, normally if I only have the [Quotation] and some [QuotationItem]s, I'd just add the info from the [Quotation] on the top of the report, and the info from each [QuotationItem] would be represented in a row inside a table (Tablix).

The problem is: Each [QuotationItem] also has many of [QuotationItemQuantity] (currently three), and they need to be represented too.

So, my report should look something like this:

But I'm stuck on how to display multiple tables (or a list and tables) for each item (QuotationItem). I tried nested tables and tables inside a list, but this doesn't seem to be allowed (I get a "Detail members can only contain static inner members" error).

I read about sub-reports and I think this might be the way to go, but I'm not sure how to use sub-reports in this case, or if this is actually the right approach.

Note: As mentioned above, each QuotationItem currently has 3 quantities, but that might be changed in the future, so would be great if the columns can be dynamic, however, this isn't a requirement at this point.

Any suggestions?

回答1:

Well, I was hoping (and still do) to get a more elegant solution instead of this ugly one (which I had to use for now) but it does what it's supposed to anyway.

I'm posting it as it might help someone with a similar problem. Here's what I did:

Preparing the data:

Created a dummy DataSet using the VS designer, and added one DataTable to it.
Added all the required columns from both tables into this DataTable.
Added the DataSet as the data source for the report.

In order to pass the actual data, I would fill a DataTable with the same structure as the designed one and then pass it to the report using something like the following:

private void Form_Load(object sender, EventArgs e)
{
    rptViewerMain.LocalReport.ReportEmbeddedResource = "MyProjectName.QuotationReport.rdlc";
    rptViewerMain.LocalReport.EnableExternalImages = true;

    if (QuotationInfo !=null && QuotationItems != null)
    {
        SetupReport();
    }

    this.rptViewerMain.RefreshReport();
}

private void SetupReport()
{
    var param1 = new ReportParameter("MyFirstParameter", SomeValue);
    var param2 = new ReportParameter("MySecondParameter", SomeOtherValue);
    // etc

    // Pass Parameters
    rptViewerMain.LocalReport.SetParameters(new[] { param1, param2, "etc" });

    // Prepare the DataTable and add the values to it
    DataTable dt = new MyDummyDataset.MyDesignedDataTable().Clone();

    foreach (var qItem in QuotationItems)
    {
        dt.Rows.Add(qItem.ItemNumber, qItem.ItemDescription, "and",
                    "so", "many", "more", "values");
    }

    // Pass the DataTable to the report as the data source replacing the dummy DataSet
    rptViewerMain.LocalReport.DataSources.Add(new ReportDataSource("MyDummyDataset", dt));
}

Designing the report:

Created only one table (Tablix) in the RDLC report and used the cell borders to make it look like 3 tables by removing the borders of the unwanted cells between the "tables":
Added the fields from the dummy DataSet to the corresponding cells in the first table (the quantities info) and above the table (the quotation item info).
For the second and third "tables", simply used expressions to do the calculations based on the values from the first table.

Note: Some fields/variables names were changed in both the question and the answer, but the idea stays the same.

来源：https://stackoverflow.com/questions/48843956/creating-an-rdlc-report-with-multiple-tables-one-to-many-relationship